Fire extinguisher



' May 22, 1928.

- 1,670,806 H. GRIFFITHS FIRE EXTINGUISHER Filed Jan. 14, 1926 jnben 2 0)? Application filed January 14, 1926,

NITED 5 HUGE GRIFFITHS,

TATES PATENT ornca.

OF LONDON, ENGLAND.

FIRE EXTINGUISHER.

This invention is for improvements in or relating to fire-ext inguishers,

and has for its object to provide an improved construction of device of 5 able fire-extingul in a closed vessel, usually some simplycan be expelled therefrom for use.

Among guishing are some w then effect bemg on ans of a non-inflammable vanature,

the fire by me pour, and

methyl-bromide may storage of containers the object vide a container w with such however, that to the use According to comprises the liquid the liquids used controlled means i-whereb the type in which a suitshing liquid is contained with y it when required portable,

for fire-extinhich are of a volatile of smothering as. an instance of such liquids such liquids, mvolves various be mentioned.

however, in closed The difliculties, and

of the present invention is to proliquid s; it is to evice suita nd other highly a chamber which when required.

hich is suitable for use he understood, the invention is not limited any particular liquid.

this invention,

ble for use with methyla fire-extinvolatile liquids is entirely hermetically sealed but has a part of its wall so arrange turable, in combination with means for stroying or puncturing such d as to be destructible or puncdepart to release This construction renders it possible to provide co principal ntainers in which the like is avoided, an

lating the use of stopd the to the storing of such liquids are thereby obviated.

According to another feature of this invention,-the fire-extinguisher comprises in combination metically so two vessels,

with an outlet nozzle, the p destructible diaphragm constituting a wall common to the two vessels,

uncturing or will so as vention,

or destroying tirely outside the compl paired; prefera a pm comprise operating extinguish aled and the other is provid whereof one is'hered phragm puncturable or and means for destroying the diaphragm at to allow the liquid to pass from the normally, sealed chamber into the secthence to the outlet nozzle.

feature of this infor puncturing eteness of its sealing is not 1mhandle or er and extendsthr bly the device, nted pin or th which may ough the second like, has an head outside the fire- Serial No. sraaaana in Great Britain January as, 1925.

situated within the sealed chamber for releasing a compressed gas, or for generating a supply of gas for propelling the liquid,

and means for effecting such release or generation simultaneously or automatically with the rupture of the diaphragm aforesaid. In one construction according to this arrangement, a bulb containin a supply of compressed gas such as car bou-dioxide may be mounted within the sealed chamber near the puncturable diaphragm, in such a position that after the pin has been moved to puncture the diaphragm, a slight further movement causes it to pierce the closure means of the bulb and release the gas into the closed chamber. The gas pressure thus applied to the liquid forces it into the second chamber and thence to the delivery nozzle of the extinguisher. i

The accompanying drawing is a central vertical section showing one construction of fire-extinguisher in accordance with the resent invention.

Referring to this drawing, the device comprises a container 1 of a suitable size to contain the desired quantity tinguishi'ng liquid. At its lower end this container is provided with an opening 2 which is closed by a thin sheet-metal dia 3 which is soldered in place. other joints in the container are all soldered so that a true hermetic closure of the vessel 1 is obtained.

A second vessel 4 providing a chamber 5 is secured in any convenient outside of the container 1 around the diaphragm 3, so that this diaphragm constitutes one of the walls of the chamber 5.. From this chamber 5 a delivery-pipe 6 ex tends in any convenient manner, and a suit able nozzle 7 is provided to form a convenient jet through which the fire-extinguishing liquid is delivered. I

Provision is made for puncturing the diaphragm 3, and in the construction illustrated there is provided a pin 8 which is mounted 20 dependent means .for

' The pin 8 may to slide the wall of the chamber 4, towards the diaphragm 3. A head or cap 10 is provided on the outer exposed end of the pin 8 to facili tate its manipulation. The pin 8 is so positioned and is of sucha length that when it is driven inwards, its pointed end 11 punctures the diaphragm 3 and thereby provides communication from the interior of the vessel 1 to the chamber 5. Any liquid contained in the vessel 1, if

it is under suficient pressure, for example, its own vapour pressure, will thereupon be driven out from the chamher 5 through the outlet-pipe 6 and nozzle 7.

A suitable handle 12 is provided on the container 1 so that the whole device can be .easily handled so as to direct the jet of liquid where it is required.

When it is required to provide some inproducing pressure on the liquid in the vessel 1, an arrangement similar to that illustrated may be used. Within the vessel 1 there is mounted a bracket 13 which constitutes a holder for a bulb 14 of the known type containing carbon-dioxide under bulbs are closed by other device which and the high pressure. These a soft metal stopper or can be easily ruptured, parts are so arranged that this bulb lies in the path of movement of the pin 8.

the device, the pin 8 is In the operation of forced inwards and it firstpunctures the diaphragm 3 and then further movement causes it to bulb 14 and release the compressed gas therefrom. This gas bubbles up through the liquid'to the top of the chamber 1 and drives the liquid out through the ruptured diaphragm 3 into the'chamber 5 and thence to the outlet-pipe 6.

It will be seen that this inventionprovides a fire-extinguishing device in which the fireextinguishing liquid is contained in a truly hermetically-sealed vessel, and no valves,

stop-cocks or special joints are required.

in a suitable guide 9, mounted in a part of the wall puncture orotherwise open the be a simple sliding fit in the.

rangements can be used, for tecting the puncturing of the diaphragm 3 and the release of the compressed gas. Also, the actual construction of the container itself the outlet pipe, and the nozzle, may be varied to suit any special requirements. llhese'and other held to lie within the scope of the present invention as set forth claims. I I

ll claims l. A fire extinguisher of the class described, comprising a casing divided into two chambers, one of said chambers constituting an hermetically sealed main liquid container or reservoir for fire extinguishing liquid and the other of said chambers being normally free from liquid and havihg an outlet nozzle, ofthe reservoir being openable by a striking pin, a striking pin arranged to open said part thereby releasing the liquid into the second chamber, and pressure generating means comprising a Vessel set entirely within the reservoir and openable by the continued movement/of the striking pinafter it has opened said reservoir.

2. A fire extinguisher of the class described, comprising a casing divided by a puncturable diaphragm into one of said chambers constituting an hermetically sealed. vessel adapted to hold fire extinguishing liquid, the secondchamber being normally free from liquid and having an in the appended example for eftwo chambers,

like modifications are all as outlet nozz'le,'a striking pin carried by the second chamber and the diaphragm, and a compressed gas bulb having a rupturable stopper mounted entirely Within said vessel, which stopper is so situated as to be opened by the continued movement of the striking. pin after it has punctured said diaphragm.

3. A fire extinguisher of the class described comprising a casin divided by a puncturable transverse diap iragm into two chambers, one at each end of the casing, one of said chambers constituting an hermetica'lly-sealed vessel adapted .to' hold fire extingui'shing liquid and the second chamber having an outlet nozzle, a striking pin carried by the casing and arranged to puncture the diaphragm, and a pressure generating vessel situated entirely cally-sealed vessel and openable by the continued movement of the strikingpin after it has punctured the diaphragm.

In testimony whereof I aflix my signature. HUGH GRIFFITHS.

arranged to puncture within said herme'ti- 

